Biomimetic Design And Mass Production Of Sustainable Multiscale Cellulose Fibers-Based Hierarchical Filter Materials For Protective Clothing

As a core part of personal protective equipment (PPE), filter materials play a key role in individual protection, especially in the fight against the COVID-19. Here, a high-performance multiscale cellulose fibers-based filter material is introduced for protective clothing, which overcomes the limitation of mutual exclusion of filtration and permeability in cellulose-based filter materials. With the hierarchical biomimetic structure design and the active surface of multiscale cellulose fibers, high PM2.5 removal efficiency of approximate to 92% is achieved with the high moisture transmission rate of 8 kg m(-2) d(-1). Through a simple and effective dip-coating and roll-to-roll process, the hierarchical filter materials can be made on a large scale and further fabricated into high-quality protective clothing by industrial production equipment.